Energy supply device and system having the same

Abstract

Energy supply device (10) for a battery-operated electric device (14) or a replacement battery pack adapter (16) with at least two electromechanical interfaces (12) for a replacement battery pack, respectively, which converts an input alternating voltage into an output direct current voltage suitable for the at least two electromechanical interfaces, respectively. It is proposed that the energy supply device has at least two mechanically separated and electrically connected housings (18, 20) with an electromechanical interface (22), respectively, which can be engaged with one of the at least two electromechanical interfaces, respectively. System consisting of at least one battery-operated electric device and / or a replacement battery pack adapter and an energy supply device, which electric device or replacement battery pack adapter for supplying energy to the electric device has at least two electromechanical interfaces for the housings of the energy supply device, respectively.

Description

Technical Field

[0001] This invention relates to an energy supply device for a battery-operated electric device or a replaceable battery pack adapter, and a system comprising at least one battery-operated electric device and / or a replaceable battery pack adapter and an energy supply device. Background Technology

[0002] Electrical devices capable of operating with replaceable battery packs are offered at very different power levels depending on the application in which they are intended. For example, there are low-power handheld power tools and gardening and household appliances that operate at 10.8V (nominally usually expressed as 12V) or 14.4V, while medium to high power levels primarily use electrical devices with voltage levels of 18V, 36V, 54V, or even 72V. Here, the voltage value is generated by the interconnection (parallel or series) of the battery cells used in the replaceable battery pack. Preferably, the battery cells are constructed as lithium-based battery cells (e.g., lithium-ion, lithium polymer, lithium metal, or the like) with a battery voltage of 3.6V, wherein the battery cells are typically cylindrical cells with the electrodes arranged at the cylindrical ends. However, the following invention is not dependent on the type and configuration of the battery cells, but can be used for any electrical device capable of operating with a replaceable battery pack.

[0003] DE 199 63 450 B4 and US 6,495,932 B1 respectively illustrate current supply devices for battery-powered power tools, which convert an input alternating voltage into an output direct current voltage and feed the output direct current voltage to the power tool. For this purpose, the current supply device has a transformer and a rectifier in a first housing, which are electrically connected via cables to a second housing configured as an adapter for coupling to the power tool via an electromechanical interface. The adapter and the electromechanical interface configuration of the power tool are designed to be compatible with the corresponding replaceable battery pack.

[0004] DE 20 2017 105 258 U1 illustrates the application of replaceable battery packs of different power or voltage levels in battery-powered power tools, wherein a replaceable battery pack adapter is used to interconnect multiple replaceable battery packs of lower voltage levels, enabling them to operate on the power tool at integer multiples of the lower voltage levels. In this way, for example, two 18V replaceable battery packs can be connected in series to achieve an operating voltage of 36V.

[0005] Instead of a replaceable battery pack adapter for multiple lower power or voltage levels, it is also possible to configure the replaceable battery pack to operate directly on multiple corresponding electromechanical interfaces of the electric equipment, so that they can operate at multiple lower power or voltage levels. Alternatively, it is also conceivable that the electric equipment continues to operate at 18V but with double the current or for double the operating time. Summary of the Invention

[0006] The objective of this invention is to provide an energy supply device for a battery-operated electric device or a replaceable battery pack adapter, the energy supply device providing the feasibility that the battery-operated electric device can operate without time constraints by inputting alternating voltage, especially grid voltage, through at least two electromechanical interfaces provided for the corresponding replaceable battery pack, thereby improving user manual operation compared to the prior art.

[0007] To address the proposed task, an energy supply device is proposed comprising at least two mechanically separate and electrically interconnected housings, each having an electromechanical interface. Each electromechanical interface of the housing is capable of engaging with one of at least two electromechanical interfaces of a battery-operated electric device or a replaceable battery pack adapter. In this manner, it is particularly advantageous to significantly shorten or replace the previously required long cable connections between the various housings of the energy supply device with different electrical connections, and to improve manual operation, eliminating the need for separate housings for the energy supply device that are detached from the electric device or replaceable battery pack adapter. Therefore, with a significant improvement in the manual operation of the electric device, high energy supply capacity can be provided by the energy supply device.

[0008] In the context of this invention, battery-powered electric equipment should be understood as, for example, an electric tool used for machining workpieces by means of an electrically driven insert tool. Here, the electric tool can be constructed not only as a handheld electric tool but also as a stationary electric motor tool. Typical electric tools in this case include handheld or vertical drills, screwdrivers, impact drills, electric hammers, planers, angle grinders, vibratory grinders, polishers, circular saws, bench saws, cutting saws, and barbed saws, or the like. However, as battery-powered electric equipment, it is also conceivable to use measuring devices such as rangefinders, laser levels, etc., or gardening equipment such as lawnmowers, lawn trimmers, pruning saws, or the like. Furthermore, this invention can also be used in conjunction with electromechanical replaceable battery pack interfaces for battery-powered household appliances (such as vacuum cleaners, blenders, etc.).

[0009] Similar to replaceable battery packs, the individual housings of the energy supply equipment can be releasably connected to battery-operated electric equipment or replaceable battery pack adapters via force-locking and / or form-locking interfaces of appropriate construction. "Releasable connection" should be understood in particular as a tool-free—i.e., hand-operated—connection that can be both detached and established.

[0010] Furthermore, it should be noted that the electromechanical interface configuration of the electric equipment or the corresponding receiving portion for force-locking and / or form-locking releasably connecting the housing of energy supply equipment of different voltage levels should not be the subject of this invention. Generally, the electromechanical interface configuration of an energy supply equipment or replaceable battery pack of a voltage level is such that it is compatible only with the corresponding interface of a battery-operated electric equipment or replaceable battery pack adapter of the same voltage or power level. Those skilled in the art will select a suitable implementation for the interface depending on the power or voltage level of the battery-operated electric equipment and / or replaceable battery pack adapter or replaceable battery pack. Therefore, the embodiments shown in some examples are only illustrative.

[0011] In another configuration of the invention, the electrical connection between the housings is implemented as a short cable connection, a plug-in connection, or a sliding connection. In this way, the electrical connection between the housings of the power supply device can be achieved while simultaneously optimizing manual operation, depending on the spacing between the electromechanical interfaces and / or their arrangement on the electric device or on the replaceable battery adapter. For example, a cable connection of approximately 10 to 15 cm in length between the housings can be envisioned. If the electromechanical interfaces of the electric device or the replaceable battery adapter are arranged, for example, closely parallel side-by-side, such that the two housings can be electromechanically coupled by means of a plug-in or sliding connection before being pushed into the corresponding electromechanical interface of the electric device, so that they can then be pushed in together, then the installation of individual housings on the electric device or on the replaceable battery adapter can also be facilitated.

[0012] Furthermore, the energy supply device's housing includes a first housing with an input stage for power factor rectification and / or correction of the input alternating voltage to a rectified intermediate circuit voltage (e.g., 400V), wherein an electrical connection circuitically connects the rectified intermediate circuit voltage to another housing. Here, at least the first housing has a power supply cable for supplying the input alternating voltage, particularly a power supply voltage, while at least one of the other housings of the energy supply device contains a DC-DC converter that converts the rectified intermediate circuit voltage into an output DC voltage (e.g., 18V or 36V) suitable for an electromechanical interface of a battery-powered electric device.

[0013] In another configuration of the invention, at least one additional housing provides potential isolation for the DC-DC voltage converter. This DC isolation of individual housings separates individual potentials, similar to the separation of a replaceable battery pack. This avoids interference (e.g., common-mode interference or compensation current). Furthermore, safety is improved when using energy supply equipment by separating the touchable parts from the input alternating voltage, especially the power supply voltage.

[0014] In order to provide an output DC voltage generated in at least one additional housing for supplying electric equipment at the electromechanical interface of the first housing having an input stage, an electrical connection between the at least one additional housing and the first housing is also used to circuit-connect the converted output DC voltage.

[0015] In an alternative configuration of the invention, each housing of the energy supply device has an input stage and a DC-DC voltage converter. The input stage is used to rectify and / or correct the power factor of an input alternating voltage, particularly a mains voltage, into a rectified intermediate circuit voltage. The DC-DC voltage converter is used to convert the rectified intermediate circuit voltage into an output DC voltage suitable for an electromechanical interface of a battery-powered electric device. Here, one housing is provided with a power supply cable for supplying an input alternating voltage, particularly a mains voltage, which is connected between housings via electrical connections implemented as cable connections, plug-in connections, or sliding connections. Advantageously, it is possible to implement an energy supply device with redundant single housings, such that failure of a single input stage does not cause the entire energy supply device to stop operating, but the electric device can continue to operate at reduced power if necessary.

[0016] Furthermore, it is possible to configure the DC-DC converter, depending on the alternative configuration, to isolate the potentials of each housing, so that the potentials of each housing are separated from each other, similar to the application of a replaceable battery pack. This avoids interference (e.g., common-mode interference or compensation current). Additionally, by separating accessible parts from the mains voltage, safety is improved when using energy supply equipment.

[0017] To enable the electric device to operate independently of the input alternating voltage, especially the mains voltage, for short periods when necessary, an additional energy storage device, particularly a supercapacitor, is integrated in at least one of the housings. This provides the required output DC voltage via an electromechanical interface of the housing. It is also conceivable that the output DC voltage of the additional energy storage device is circuitically connected to other electromechanical interfaces of the electric device or the replaceable battery adapter via an electrical connection between the housings of the energy supply equipment. Furthermore, if the electric device (e.g., in cases where high torque is required for short periods) demands a high pulse current value, this additional energy storage device can also be used to provide that high pulse current value.

[0018] The present invention also relates to a system comprising at least one battery-operated electric device and / or a replaceable battery pack adapter and an energy supply device according to the invention, wherein the battery-operated electric device or the replaceable battery pack adapter for supplying energy to the electric device has at least two electromechanical interfaces for the housing of the energy supply device, respectively. Attached Figure Description

[0019] The following is based on Figures 1 to 3 The invention is explained by way of example, wherein the same reference numerals in the drawings denote the same components having the same functional principle.

[0020] It shows

[0021] Figure 1 A schematic diagram of an energy supply device according to the present invention, the energy supply device having two housings that are pushed into electromechanical interfaces of an electric device or an alternating voltage adapter.

[0022] Figure 2 : A schematic diagram of an electric device constructed as an electric hammer, the electric device having an energy supply device according to the present invention.

[0023] Figure 3 : A schematic diagram of an electric device configured as a cutting saw and / or a miter saw, said electric device having an energy supply device according to the invention, and

[0024] Figure 4 : A schematic diagram of an electric device constructed as a drilling rig, which is supplied with energy by an alternating voltage adapter according to the invention. Detailed Implementation

[0025] Figure 1 A first embodiment of the energy supply device 10 according to the present invention is shown, the energy supply device having two plug-in battery-operated electric devices 14 or replaceable battery pack adapters 16 (see here). Figures 2 to 4 The electromechanical interfaces 12 of the battery-operated electric device 14 or the replaceable battery pack adapter 16 are typically provided for receiving a corresponding replaceable battery pack (not shown) for power supply to the electric device 14. In this respect, the two housings 18, 20 also have corresponding electromechanical interfaces 22 corresponding to the electromechanical interfaces 12 of the electric device 14 or the replaceable battery pack adapter 16, which can be releasably engaged by force-locking and / or form-locking respectively. Here, "releasable connection" should be understood in particular as a tool-free—i.e., by hand—releasable and establishable connection. The releasable connection of each housing 18, 20 can be additionally locked by means of a mechanical locking device 24 to prevent accidental release. Here, the locking device 24 has a spring-loaded button 26, which engages with the locking element 28 of the housings 18, 20 of the power supply device 10 (see...) Figure 4 The locking mechanism 26 engages with the battery-operated electric device 14 or the replaceable battery adapter 16 when the housings 18, 20 are pushed in, due to the elasticity of the button 26 and / or locking element 28. If the operator presses the button 26 in the pushing direction E, the lock is released and the operator can remove or push the housings 18, 20 of the electric device 10 out of the battery-operated electric device 14 or the replaceable battery adapter 16 in the opposite direction of pushing in E.

[0026] As mentioned at the beginning, the configuration of the electromechanical interfaces 12, 22 depends particularly on the power or voltage level of the electric device 14, the associated replaceable battery pack, or the energy supply device 10. The power or voltage level typically varies from manufacturer to manufacturer, and therefore should not be discussed further here. Those skilled in the art are well aware of the feasibility of different configurations of the electromechanical interfaces. For the present invention itself, they are of only secondary importance.

[0027] Energy supply device 10 will input alternating voltage U AC The preferred grid voltage is converted into an output DC voltage U by an electromechanical interface 12 suitable for battery-powered electric equipment 14. DC The output DC voltage is provided to the electric device 14 for its operation. In order to use the input alternating voltage U... AC The power supply device 10 has two housings 18 and 20. The first housing 18 has a power supply cable 32, which, in the illustrated embodiment, has a power plug 34 at one end for a socket (not shown in more detail), particularly a wall socket. In the case of grid power, an alternating voltage U is input. ACIt is constructed to use a grid voltage with a nationally or regionally common alternating voltage value (e.g., 230V or 110V).

[0028] The first housing 18 and the second housing 20 of the energy supply device 10 are mechanically separated and electrically connected by means of an electrical connection 38, for example, configured as a cable connection 36. For example, a cable connection 36 approximately 10 to 15 cm long can be envisioned between the individual housings 18 and 20. In this way, optimized manual operation of the electric device 14 can be achieved depending on the spacing between the electromechanical interfaces 12 and / or their arrangement on the electric device 14 or on the replaceable battery pack adapter 16. Instead of the cable connection 36, a plug-in connection or sliding connection (not shown in more detail) can also be envisioned as the electrical connection 38 (see [link to relevant documentation]). Figure 3 In this case, housings 18 and 20 each have a complementary, side-mounted connection device in the form of an electromechanical interface. Those skilled in the art will select suitable interfaces here, and their detailed configurations should not be discussed further.

[0029] The first housing 18 is provided with a means for transmitting the input alternating voltage U AC The power factor is rectified and / or corrected to the rectified intermediate circuit voltage U. VL Input stage 40 (e.g., 400V). Electrical connection 38 is used here to transfer the rectified intermediate circuit voltage U. VL The circuit is connected to the second housing 20. This is to convert the rectified intermediate circuit voltage U... VL Converts the output DC voltage U of the electromechanical interface 12 to a type of battery-operated electric device 14 or a replaceable battery pack adapter 16. DC (e.g., 18V or 36V), the second housing 20 has a DC voltage converter 42. This is to provide the output DC voltage U generated in the second housing 20 also at the electromechanical interface 22 of the first housing 18, which has an input stage 40. DC The electrical connection 38 between the second housing 20 and the first housing 18, used to supply the electric device 14, is also for the converted output DC voltage U. DC The circuit is connected. Therefore, electrical connection 38 can simultaneously connect multiple different voltage circuits between individual housings 18, 20 of the energy supply device 10.

[0030] Furthermore, the DC-DC voltage converter 42 of the second housing 20 can provide potential isolation, so that the potentials of the housings 18 and 20 are separated from each other, similar to the DC-DC separation in the application of a replaceable battery pack. This also avoids interference (e.g., common-mode interference or compensation current). Additionally, by connecting the touchable portion to the input alternating voltage U... AC Separate them to improve safety when using energy supply equipment 10.

[0031] Alternatively, it can be conceived that each housing 18, 20 of the energy supply device 10 has an input stage 40 and a DC-DC voltage converter 42, the input stage being used to convert the input alternating voltage U AC The power factor is rectified and / or corrected to the rectified intermediate circuit voltage U. VL The DC-DC voltage converter is used to convert the rectified intermediate circuit voltage U VL Converted to the output DC voltage U of the electromechanical interface 12 suitable for battery-powered electric equipment 14 DC Here, one of the housings 18 and 20 can be provided for input alternating voltage U AC The power supply cable 32, the input alternating voltage U AC Here, the circuit is connected via electrical connection 38 between housings 18 and 20, and is respectively converted into output DC voltage U. DC In this way, it is advantageous to realize an energy supply device 10 with redundant single housings 18, 20, so as to avoid the entire energy supply device 10 from stopping in the event of failure of one of the individual input stages 40, and thus to continue to use the electric equipment 14 in an emergency operation mode with reduced output power if necessary.

[0032] In order to enable the electric device 14 to be temporarily independent of the input AC voltage U when necessary AC The system operates by integrating an additional energy storage device 43, particularly a supercapacitor, within the second housing 20. This additional energy storage device provides the required output DC voltage U via an electromechanical interface 22 of the second housing 20. DC In addition, the additional energy storage 43 outputs a DC voltage U. DC The circuit can be connected to the electric device 14 or other electromechanical interfaces 12 of the replaceable battery pack adapter 16 via the electrical connection 38 between the housings 18 and 20 of the energy supply device 10. Furthermore, if the electric device 14 requires a high pulse current value (e.g., in the case of high torque needed for a short period of time), such an additional energy storage device 43 can also be used to provide the high pulse current value.

[0033] exist Figure 2The diagram illustrates a system comprising a battery-operated electric device 14 configured as a hammer drill 44 and an energy supply device 10 having two housings 18, 20. For energy supply, the hammer drill 44 includes two electromechanical interfaces 12, one for each of the housings 18, 20 of the energy supply device 10. Interfaces 12 are typically used for energy supply by corresponding replaceable battery packs, which are not shown here but can substantially correspond externally to the housings 18, 20 of the energy supply device. For example, the hammer drill can be supplied with an output DC voltage of 18V through each of its electromechanical interfaces 12, which is added internally within the hammer drill 44 via corresponding series circuits to result in an operating voltage of 36V.

[0034] Without limiting the invention, the system may include different power devices 14 that operate on the power supply device 10 and are configured as power tools, gardening equipment, or household appliances. Similarly, the number of electromechanical interfaces 12 on the power device 14 or the number of housings 18, 20 of the power supply device 10 that are configured with electromechanical interfaces 22 can be varied. It is also entirely conceivable to have more than two housings 18, 20 or electromechanical interfaces 12, 22.

[0035] The electric hammer 44 has a hammer 46 (not shown in more detail) for rotating and / or impacting an insert tool 48 around or along a machining axis 50 by means of a drill chuck 52. The hammer 46 is operated by an electric motor 54 (only outlined), which is powered by a power electronics unit 56. The power electronics unit 56 is controlled by a monitoring unit 58 integrated into the electric hammer 44 to adjust or control the electric motor 54, for example, according to a main switch 60 operable by the operator. However, a further detailed description of the electric device 14 configured as the electric hammer 44 is omitted here, as it is no longer relevant to the present invention and the electric hammer 44 should be understood as merely an example of a different electric device 14 that can be powered by an energy supply device 10.

[0036] In the illustrated embodiment, the housings 18 and 20 of the energy supply device 10 are interconnected via cable connection 38. The energy supply of the energy supply device 10 is similar to... Figure 1 Ground is supplied via power cable 32 and power plug 34 fastened to one end with an input alternating voltage U, for example, 230V. AC Proceed. For example, regarding... Figure 1 As explained, the input alternating voltage is converted into an output DC voltage U, for example, 18V. DC And it is connected by circuitry to each individual electromechanical interface 12 of the electric hammer 44. Within the electric hammer itself, two output DC voltages U are applied here. DC The sums are, for example, an operating voltage of 36V.

[0037] In order to allow individual housings 18, 20 to be pushed into or pushed out of the electromechanical interface 12 of the hammer drill 14, the cable connection 38 has a length that exceeds the longitudinal extension L of the housings 18, 20 by at least 2 cm (see...). Figure 1 In common replaceable battery packs used in power tools, the length of cable connector 38 can be, for example, between approximately 10 and 15 cm. It is also conceivable that cable connector 38 can be configured to be pushed into or pulled into one of the housings 18, 20, so as to shorten the cable length for better hand operation after the housings 18, 20 are pushed into the electromechanical interface 12 of the hammer drill 44.

[0038] exist Figure 3 The diagram shows a battery-operated electric device 14 configured as a cutting saw and / or miter saw 62. The cutting saw and / or miter saw 62 has a swing arm 64, which, along a longitudinal axis 66, includes, in particular, an operating unit 68 equipped with a motor 54 and two parallel, side-by-side electromechanical interfaces 12 for receiving two replaceable battery packs (not shown). The replaceable battery packs are electrically connected in series, resulting in an operating voltage of 36V generated by a single output DC voltage (e.g., 18V each). Alternatively, the cutting saw and / or miter saw 62 can also be operated using a power supply device 10. For this purpose, the two housings 18, 20 can first be interconnected by means of an electrical connection 38 configured as a plug-in or sliding connection 70 (shown only in outline), so that they can then be pushed together with their respective electromechanical interfaces 22 into the corresponding electromechanical interfaces 12 of the cutting saw and / or miter saw 62. Therefore, unlike according to... Figure 1 and 2 In this embodiment, no cable connection is required between the housings 18, 20. Correspondingly to the replaceable battery pack, the energy supply device 10 also provides a respective 18V output DC voltage U through each of its housings 18, 20. DC This results in an operating voltage of 36V generated by a series circuit inside the cutting saw and / or miter saw 62.

[0039] The swing arm 64 of the cutting saw and / or miter saw 62 is used to movably support the operating unit 68 and the blade holder 72 operatively connected thereto by means of a handle 74. For this purpose, the swing arm 64 (particularly relative to the workpiece support surface 80) is oscillating about a swing axis 76 and / or torsional about a longitudinal axis 66 connected to the base unit 78 of the cutting saw and / or miter saw 62. For machining the workpiece, a saw blade 82, rotaryly driven by the motor 54 of the operating unit 68, is received in the blade holder 72, which is similarly supported by the blade holder 72 in an inclined and / or rotatable manner relative to the workpiece support surface 80 within the machining plane 84 via the swing arm 64. To protect the operator from injury by the saw blade 82, a protective cover 86, preferably movably supported, can be provided on the swing arm 64. The base unit 78 of the cutting saw and / or miter saw 62 can be rested on a base (e.g., a floor, table, or the like) by means of at least one support leg 88. Figure 2 Since the invention has already been described, a further, more detailed description of the electric device 14 configured as a cutting saw and / or miter saw 64 should be omitted here, as it is no longer relevant to the present invention.

[0040] exist Figure 4 The image shows a battery-powered electric device 14 configured as an impact drill 90. This differs from the [previous design / model]. Figure 2 and Figure 3 The two electric devices 14, the impact drill 90, each have only one electromechanical interface 12, which has correspondingly constructed electrical contacts 100 for power supply at, for example, an operating voltage of 36V and / or for transmitting operation-related data such as temperature, encoding, or the like. Similar to... Figure 2 The hammer drill 44 and the impact drill 90 also have a hammer (not shown in more detail) for rotating and / or impacting the insert tool around or along the machining axis 92 by means of the drill chuck 94. Here, the hammer is driven by a main switch 98 located in the handle 96 via a motor 54 (only outlined), which controls power electronics (also not shown in more detail) via a monitoring unit (not shown in more detail).

[0041] In order to enable the replaceable battery packs to operate at, for example, 18V each on the impact drill 90, a replaceable battery pack adapter 16 can be used, which enables two DC output voltages U, each having 18V. DCThe replaceable battery packs are connected in series, resulting in a 36V operating voltage. For this purpose, the replaceable battery pack adapter 16 has an electromechanical interface 22 complementary to the electromechanical interface 12 of the impact drill 90. The replaceable battery pack adapter 16 provides the 36V operating voltage through this interface 22 and the electrical contacts 100 disposed therein. Furthermore, the replaceable battery pack adapter 16 has two electromechanical interfaces 12 for receiving the respective replaceable battery packs. The electromechanical interfaces 12 are also provided with corresponding electrical contacts 100 for the electrical contacts 100 of the replaceable battery packs.

[0042] Instead of a replaceable battery pack, the energy supply device 10 can also supply energy to the impact drill 90 via its two housings 18, 20, as already described. Its electromechanical interface 22 is constructed complementary to the electromechanical interface 12 of the replaceable battery pack and the replaceable battery pack adapter 16, thereby providing an output DC voltage U, for example, 18V each, from the housings 18, 20. DC The sum of these values ​​in the replaceable battery pack adapter results in a 36V operating voltage.

[0043] The detachable connection between the replaceable battery adapter 16 and the impact drill 90 on one hand, and the housings 18, 20 of the power supply device 10 on the other hand, can be additionally locked by means of mechanical locking devices 24 to prevent accidental loosening. Here, the locking devices 24 of the replaceable battery adapter 16 or the housings 18, 20 of the power supply device 10 each have a spring-loaded button 26, which is operatively connected to the locking element 28 of the replaceable battery adapter 16 or the housings 18, 20 of the power supply device 10. Due to the elasticity of the button 26 and / or the locking element 28, when the housings 18, 20 are pushed in, the locking device 26 automatically engages with the corresponding retaining device 30 of the electromechanical interface 12 of the impact drill 90 or the replaceable battery adapter 16. If the operator presses one of the buttons 26 in the pushing direction E, the lock is released and the operator can remove or push out the corresponding housings 18, 20 of the power supply device 10 or the replaceable battery adapter 16 in the opposite direction of the pushing direction.

[0044] Finally, it should be noted that this invention is not limited to the present invention. Figures 1 to 4 The illustrated embodiment. In particular, the electromechanical interfaces of the housings 18, 20 of the energy supply device 10 should be understood exemplarily. Correspondingly applicable are the voltage values ​​mentioned and the number of housings 18, 20 of the energy supply device 10. For example, an energy supply device 10 with two 36V housings can be used on an electric device 14 operating with a 72V battery, but it can also be used with four 18V housings. Furthermore, it should be understood that the mentioned input alternating voltage U... ACIt varies from country to country.

Claims

1. An energy supply device (10) for a battery-operated electric device (14) or a replaceable battery pack adapter (16), wherein the battery-operated electric device or the replaceable battery pack adapter has at least two electromechanical interfaces (12) for a replaceable battery pack, wherein, The energy supply device (10) will input alternating voltage (U AC ) respectively convert to the output DC voltage (U) of the electromechanical interface (12) of the battery-operated electric equipment (14) or the replaceable battery pack adapter (16) for use with the battery-operated electric equipment (14). DC The energy supply device (10) is characterized in that it has at least two mechanically separated and electrically connected housings (18, 20), each housing (18, 20) having an electromechanical interface (22), wherein the electromechanical interface (22) of the housing (18, 20) is capable of engaging with one of the at least two electromechanical interfaces (12) of the battery-operated electric device (14) or the replaceable battery pack adapter (16).

2. The energy supply device (10) according to claim 1, characterized in that, The input alternating voltage (U) AC () is the grid voltage.

3. The energy supply device (10) according to claim 1 or 2, characterized in that, The electrical connection (38) between the housings (18, 20) is implemented as a cable connection (36), a plug connection (70), or a sliding connection (70).

4. The energy supply device (10) according to claim 3, characterized in that, The first housing in the housing (18) has a function for receiving the input alternating voltage (U) AC Voltage rectification and / or correction to rectified intermediate circuit voltage (U) AL The input stage (40) of the rectified intermediate circuit voltage (U) is such that the electrical connection (38) causes the voltage of the intermediate circuit to be rectified. VL The circuit is connected to at least one other housing (20).

5. The energy supply device (10) according to claim 4, characterized in that, At least the first housing (18) has a function for receiving the input alternating voltage (U) AC ) The power supply cable (32) is used for supplying power.

6. The energy supply device (10) according to claim 4 or 5 above, characterized in that, At least one of the additional housings in the housing (20) has a DC voltage converter (42) that converts the rectified intermediate circuit voltage (U) VL ) is converted into the output DC voltage (U) of the electromechanical interface (12) of the battery-operated electric equipment (14) or the replaceable battery pack adapter (16). DC ).

7. The energy supply device (10) according to claim 6, characterized in that, The DC voltage converter (42) of the at least one additional housing (20) is electrically isolated.

8. The energy supply device (10) according to claim 6, characterized in that, The electrical connection (38) will connect the output DC voltage (U) DC The circuit is connected to the first housing (18).

9. The energy supply device (10) according to claim 1 or 2, characterized in that, Each housing (18, 20) has an input stage (40) and a DC-DC voltage converter (42), the input stage being used to convert the input alternating voltage (U) AC The power factor is rectified and / or corrected to the rectified intermediate circuit voltage (U). AL The DC-DC voltage converter is used to convert the rectified intermediate circuit voltage (U) VL ) is converted into the output DC voltage (U) of the electromechanical interface (12) of the battery-operated electric equipment (14) or the replaceable battery pack adapter (16). DC ).

10. The energy supply device (10) according to claim 9, characterized in that, The DC voltage converter (42) in each housing (18, 20) is electrically isolated.

11. The energy supply device (10) according to claim 1 or 2, characterized in that, An additional energy storage device is integrated in at least one of the housings (18, 20).

12. The energy supply device (10) according to claim 11, characterized in that, The additional energy storage device is a supercapacitor.

13. A system comprising at least one battery-operated electric device (14) and / or a replaceable battery pack adapter (16) and an energy supply device (10) according to any one of claims 1 to 12, wherein, The battery-operated electric device (14) or the replaceable battery pack adapter (16) for supplying energy to the electric device (14) has at least two electromechanical interfaces (22) for the housing (18, 20) of the energy supply device (10).

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